The first and the last critical frequency of an RC driving point impedance function must respectively by

The first and the last critical frequency of an RC driving point imped

1.	The first and the last critical frequency of an RC driving point impedance function must respectively by
A.	a zero and a pole
B.	a zero and a zero
C.	a pole and a pole
D.	a pole and a zero
Answer» B. a zero and a zero